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package com.oracle.truffle.llvm.runtime.nodes.func;

import com.oracle.truffle.api.dsl.NodeField;
import com.oracle.truffle.api.dsl.Specialization;
import com.oracle.truffle.api.frame.VirtualFrame;
import com.oracle.truffle.llvm.runtime.except.LLVMUserException.LLVMUserExceptionWindows;
import com.oracle.truffle.llvm.runtime.memory.LLVMStack;
import com.oracle.truffle.llvm.runtime.nodes.api.LLVMExpressionNode;

@NodeField(name = "exceptionSlot", type = int.class)
public abstract class LLVMCleanupPadNode extends LLVMExpressionNode {

    abstract int getExceptionSlot();

    @Specialization
    long doCleanupPad(VirtualFrame frame) {
        LLVMStack stack = (LLVMStack) frame.getArguments()[0];
        LLVMUserExceptionWindows exception = (LLVMUserExceptionWindows) frame.getObject(getExceptionSlot());

        getLanguage().contextThreadLocal.get().pushException(exception);

        // also see LLVMCatchPadNode
        long oldStackPointer = stack.getStackPointer();
        stack.setStackPointer(exception.getStackPointer());
        return oldStackPointer;
    }

    public static LLVMCleanupPadNode create(int exceptionSlot) {
        return LLVMCleanupPadNodeGen.create(exceptionSlot);
    }
}
